Live
'live' is the definition.
(I know that reside is a more specific form of the action live)
This is all the clue.
(Other definitions for reside that I've seen before include "Dwell permanently" , "Live in permanently" , "Make one's home permanently" , "Inhabit" , "Live (in a place)" .)
'live' is the definition.
(I know that live can be written as exist)
This is the entire clue.
(Other definitions for exist that I've seen before include "Be alive" , "Have objective reality" , "Survive" , "Get a life!" , "Subsist" .)
'live' is the definition.
(to live/dwell somewhere)
This is all the clue.
(Other definitions for dwell that I've seen before include "Inhabit" , "Focus attention (on)" , "Live (in a place)" , "Settle" , "Remain" .)
(Other definitions for ill that I've seen before include "Under the weather" , "weak" , "I will (abbrev.) (1'2)" , "Shakespeare: '. . . met by moonlight'" , "Groggy" .)
'live' is the definition.
('they live' means 'they are')
This is all the clue.
(Other definitions for are that I've seen before include "(We/they/you) exist" , "live" , "Unit of land measure equal to 100 square metres" , "Is, in the plural" , "Exist; square measure" .)